Vanadium, Niobium, and Tantalum
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Evolution and Understanding of the D-Block Elements in the Periodic Table Cite This: Dalton Trans., 2019, 48, 9408 Edwin C
Dalton Transactions View Article Online PERSPECTIVE View Journal | View Issue Evolution and understanding of the d-block elements in the periodic table Cite this: Dalton Trans., 2019, 48, 9408 Edwin C. Constable Received 20th February 2019, The d-block elements have played an essential role in the development of our present understanding of Accepted 6th March 2019 chemistry and in the evolution of the periodic table. On the occasion of the sesquicentenniel of the dis- DOI: 10.1039/c9dt00765b covery of the periodic table by Mendeleev, it is appropriate to look at how these metals have influenced rsc.li/dalton our understanding of periodicity and the relationships between elements. Introduction and periodic tables concerning objects as diverse as fruit, veg- etables, beer, cartoon characters, and superheroes abound in In the year 2019 we celebrate the sesquicentennial of the publi- our connected world.7 Creative Commons Attribution-NonCommercial 3.0 Unported Licence. cation of the first modern form of the periodic table by In the commonly encountered medium or long forms of Mendeleev (alternatively transliterated as Mendelejew, the periodic table, the central portion is occupied by the Mendelejeff, Mendeléeff, and Mendeléyev from the Cyrillic d-block elements, commonly known as the transition elements ).1 The periodic table lies at the core of our under- or transition metals. These elements have played a critical rôle standing of the properties of, and the relationships between, in our understanding of modern chemistry and have proved to the 118 elements currently known (Fig. 1).2 A chemist can look be the touchstones for many theories of valence and bonding. -
Transport of Dangerous Goods
ST/SG/AC.10/1/Rev.16 (Vol.I) Recommendations on the TRANSPORT OF DANGEROUS GOODS Model Regulations Volume I Sixteenth revised edition UNITED NATIONS New York and Geneva, 2009 NOTE The designations employed and the presentation of the material in this publication do not imply the expression of any opinion whatsoever on the part of the Secretariat of the United Nations concerning the legal status of any country, territory, city or area, or of its authorities, or concerning the delimitation of its frontiers or boundaries. ST/SG/AC.10/1/Rev.16 (Vol.I) Copyright © United Nations, 2009 All rights reserved. No part of this publication may, for sales purposes, be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, electrostatic, magnetic tape, mechanical, photocopying or otherwise, without prior permission in writing from the United Nations. UNITED NATIONS Sales No. E.09.VIII.2 ISBN 978-92-1-139136-7 (complete set of two volumes) ISSN 1014-5753 Volumes I and II not to be sold separately FOREWORD The Recommendations on the Transport of Dangerous Goods are addressed to governments and to the international organizations concerned with safety in the transport of dangerous goods. The first version, prepared by the United Nations Economic and Social Council's Committee of Experts on the Transport of Dangerous Goods, was published in 1956 (ST/ECA/43-E/CN.2/170). In response to developments in technology and the changing needs of users, they have been regularly amended and updated at succeeding sessions of the Committee of Experts pursuant to Resolution 645 G (XXIII) of 26 April 1957 of the Economic and Social Council and subsequent resolutions. -
Chemistry of the Corrosion of Metals in Presence of Molten Vanadium Pentoxide
CHEMISTRY OF THE CORROSION OF METALS IN PRESENCE OF MOLTEN VANADIUM PENTOXIDE THESIS Submitted for the Degree of DOCTOR OF PHILOSOPHY THE UNIVERSITY OF LONDON by KAILATHUVALAPPIL INNIRI VASU February, 1964 Department of Metallurgy, Royal School of Mines, Imperial College, London, S.W.7. The author is grateful to Dr. D. A. Pantony, who supervised this research project, for his constant encouragement, numerous suggestions and stimulating discussions; to his colleagues and the members of the teaching and technical staff of the Department of Metallurgy, Imperial College, for their helpful co—operation; and to the British Petroleum Company Limited for financial assistance. CONTENTS ABSTRACT NOMENCLATURE vi I. INTRODUCTION A. HISTORY 1 B. NATURE OF CORROSION 2 C. ACTIVATION - AND DIFFUSION - CONTROLLED PROCESSES 4 D. RELEVANT PREVIOUS INVESTIGATIONS 6 E. APPROACH TO THE PROBLEM 9 (a) PHYSICAL-CHEMICAL STUDIES ON VANADIC MELTS (1)Dissociation Equilibrium 10 (2)Kinetics of the Oxidation of Vanadium Dioxide 11 (3)Cryoscopy 11 (4)Conductivity of Vanadic Melts 11 (5)Viscosity and Density 12 (b) CORROSION OF METALS IN THE PRESENCE OF MOLTEN VANADIUM PENTOXIDE (1)General Nature 12 (2)In Relation to Gas-Turbine Corrosion 13 (3)A Model for Study 14 (3a) The Corrosion Layer 19 (4)Metal Surface and Corrosion 23 (5)Prevention of Corrosion 23 II. EXPERIMENTAL A. MATERIALS (a)Vanadium Pentoxide 25 (b)Metals 25 (c)Metal Oxides 27 (d)Oxygen, Nitrogen, and Oxygen- Nitrogen Mixtures 28 B. SPECIMENS FOR CORROSION STUDIES 30 C. EXPERIMENTAL PROCEDURE (a)Container -
Downloaded for Personal Non-Commercial Research Or Study, Without Prior Permission Or Charge
https://theses.gla.ac.uk/ Theses Digitisation: https://www.gla.ac.uk/myglasgow/research/enlighten/theses/digitisation/ This is a digitised version of the original print thesis. Copyright and moral rights for this work are retained by the author A copy can be downloaded for personal non-commercial research or study, without prior permission or charge This work cannot be reproduced or quoted extensively from without first obtaining permission in writing from the author The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the author When referring to this work, full bibliographic details including the author, title, awarding institution and date of the thesis must be given Enlighten: Theses https://theses.gla.ac.uk/ [email protected] REDUCTION OF MOLYBDENUM AND TUNGSTEN HEXAFLUORIDES TO THE PENTAVALENT STATE. A thesis submitted to the University of Glasgow for the degree of M.Sc. in the Faculty of Science. by NASHUNMENGHE BAO Department of Chemistry, University of Glasgow. November 1989, (c) Nashunmenghe ProQuest Number: 10999292 All rights reserved INFORMATION TO ALL USERS The quality of this reproduction is dependent upon the quality of the copy submitted. In the unlikely event that the author did not send a com plete manuscript and there are missing pages, these will be noted. Also, if material had to be removed, a note will indicate the deletion. uest ProQuest 10999292 Published by ProQuest LLC(2018). Copyright of the Dissertation is held by the Author. All rights reserved. This work is protected against unauthorized copying under Title 17, United States C ode Microform Edition © ProQuest LLC. -
S42004-019-0231-3.Pdf — Adobe
ARTICLE https://doi.org/10.1038/s42004-019-0231-3 OPEN Niobium pentoxide nanomaterials with distorted structures as efficient acid catalysts Kai Skrodczky1, Margarida M. Antunes2, Xianying Han1, Saveria Santangelo 3, Gudrun Scholz1, Anabela A. Valente 2*, Nicola Pinna 1* & Patrícia A. Russo1* 1234567890():,; Niobium pentoxides are promising acid catalysts for the conversion of biomass into fuels and chemicals. Developing new synthesis routes is essential for designing niobium pentoxide catalysts with improved activity for specific practical processes. Here we show a synthesis approach in acetophenone, which produces nanostructured niobium pentoxides with varying structure and acidity that act as efficient acid catalysts. The oxides have orthorhombic structures with different extents of distortions and coordinatively unsaturated metal atoms. A strong dependence is observed between the type and strength of the acid sites and specific structural motifs. Ultrasmall niobium pentoxide nanoparticles, which have strong Brønsted acidity, as well as Lewis acidity, give product yields of 96% (3 h, 140 °C, 100% conversion), 85% (3 h, 140 °C, 86% conversion), and 100% (3 h, 110 °C, 100% conversion) in the reac- tions of furfuryl alcohol, 5-(hydroxymethyl)furfural, and α-angelica lactone with ethanol, respectively. 1 Institut für Chemie and IRIS Adlershof, Humboldt-Universität zu Berlin, Berlin, Germany. 2 Department of Chemistry, CICECO, University of Aveiro, Aveiro, Portugal. 3 Dipartimento di Ingegneria Civile, dell’Energia, dell’Ambiente e dei Materiali (DICEAM), Università “Mediterranea”, Reggio Calabria, Italy. *email: [email protected]; [email protected]; [email protected] COMMUNICATIONS CHEMISTRY | (2019) 2:129 | https://doi.org/10.1038/s42004-019-0231-3 | www.nature.com/commschem 1 ARTICLE COMMUNICATIONS CHEMISTRY | https://doi.org/10.1038/s42004-019-0231-3 iobium pentoxides show high potential as acid catalysts will also allow getting insights into the structure–acidity–activity Nfor the sustainable production of fuels and chemicals from relationships. -
(VI) and Chromium (V) Oxide Fluorides
Portland State University PDXScholar Dissertations and Theses Dissertations and Theses 1976 The chemistry of chromium (VI) and chromium (V) oxide fluorides Patrick Jay Green Portland State University Follow this and additional works at: https://pdxscholar.library.pdx.edu/open_access_etds Part of the Chemistry Commons Let us know how access to this document benefits ou.y Recommended Citation Green, Patrick Jay, "The chemistry of chromium (VI) and chromium (V) oxide fluorides" (1976). Dissertations and Theses. Paper 4039. https://doi.org/10.15760/etd.5923 This Thesis is brought to you for free and open access. It has been accepted for inclusion in Dissertations and Theses by an authorized administrator of PDXScholar. Please contact us if we can make this document more accessible: [email protected]. All ABSTRACT OF THE TllESIS OF Patrick Jay Green for the Master of Science in Chemistry presented April 16, 1976. Title: Chemistry of Chromium(VI) and Chromium(V) Oxide Fluorides. APPROVEO BY MEMBERS OF THE THESIS CO'"o\l TIEE: y . • Ii . ' I : • • • • • New preparative routes to chromyl fluoride were sought. It was found that chlorine ironofluoride reacts with chromium trioxide and chromyl chlo ride to produce chromyl fluoride. Attempts were ~ade to define a mechan ism for the reaction of ClF and Cr0 in light of by-products observed 3 and previous investigations. Carbonyl fluoride and chromium trioxide react to fom chro·yl fluoride and carbo:i dioxide. A mechanism was also proposed for this react10n. Chromium trioxide 11itl\ l~F6 or WF5 reacts to produce chromyl fluoride and the respective oxide tetrafluoride. 2 Sulfur hexafluoride did not react with Cr03. -
Enrichment Strategies for Phosphoproteomics: State-Of-The-Art
Rev Anal Chem 31 (2012): 29–41 © 2012 by Walter de Gruyter • Berlin • Boston. DOI 10.1515/revac-2011-0025 Enrichment strategies for phosphoproteomics: state-of-the-art Barbora Salovska 1,2, *, Ales Tichy 1,2 , Martina MIP molecularly imprinted polymer Rezacova 1 , Jirina Vavrova 2 and Eva Novotna 2 MOAC metal oxide affi nity chromatography MS mass spectrometry 1 Department of Medical Biochemistry , Faculty of NTA nitriloacetic acid Medicine in Hradec Kralove, Charles University in PTMs post-translational modifi cations Prague, Hradec Kr á lov é , Czech Republic , pS phosphoserine e-mail: [email protected] pT phosphothreonine 2 Department of Radiobiology , Faculty of Military Health pY phosphotyrosine Sciences, University of Defence, Hradec Kralove , RPLC reversed phase liquid chromatography Czech Republic SAX strong anion-exchange chromatography SCX strong cation-exchange chromatography * Corresponding author Introduction Abstract Protein phosphorylation is a key regulator in many biological The human genome involves approximately 30,000 protein- processes, such as homeostasis, cellular signaling and com- coding genes; the human proteome contains several million munication, transcriptional and translational regulation, and different protein effectors. This is due to alternative splic- apoptosis. The defects in this tightly controlled reversible post- ing of genes and post-translational modifi cations (PTMs). translational modifi cation have been described to contribute Several hundred PTMs are currently known, among them to genesis and -
Theoretical and Experimental Aspects of Current and Future Research on Nbo2 Thin Film Devices
crystals Review Theoretical and Experimental Aspects of Current and Future Research on NbO2 Thin Film Devices Denis Music 1,* , Andreas M. Krause 1 and Pär A. T. Olsson 1,2 1 Department of Materials Science and Applied Mathematics, Malmö University, SE-205 06 Malmö, Sweden; [email protected] (A.M.K.); [email protected] (P.A.T.O.) 2 Division of Mechanics, Lund University, Box 118, SE-221 00 Lund, Sweden * Correspondence: [email protected]; Tel.: +46-40-6658709 Abstract: The present research front of NbO2 based memory, energy generation, and storage thin film devices is reviewed. Sputtering plasmas contain NbO, NbO2, and NbO3 clusters, affecting nucleation and growth of NbO2, often leading to a formation of nanorods and nanoslices. NbO2 (I41/a) undergoes the Mott topological transition at 1081 K to rutile (P42/mnm), yielding changes in the electronic structure, which is primarily utilized in memristors. The Seebeck coefficient is a key physical parameter governing the performance of thermoelectric devices, but its temperature behavior is still controversial. Nonetheless, they perform efficiently above 900 K. There is a great potential to improve NbO2 batteries since the theoretical capacity has not been reached, which may be addressed by future diffusion studies. Thermal management of functional materials, comprising thermal stress, thermal fatigue, and thermal shock, is often overlooked even though it can lead to failure. NbO2 exhibits relatively low thermal expansion and high elastic modulus. The future for NbO2 thin film devices looks promising, but there are issues that need to be tackled, such as dependence of properties on strain and grain size, multiple interfaces with point and extended defects, and interaction with various natural and artificial environments, enabling multifunctional Citation: Music, D.; Krause, A.M.; applications and durable performance. -
The Oxidizing Behavior of Some Platinum Metal Fluorides
Lawrence Berkeley National Laboratory Lawrence Berkeley National Laboratory Title THE OXIDIZING BEHAVIOR OF SOME PLATINUM METAL FLUORIDES Permalink https://escholarship.org/uc/item/46b5r4v5 Author Graham, Lionell Publication Date 1978-10-01 eScholarship.org Powered by the California Digital Library University of California LBL-8088.c,y '': ·,~, . ' '~~.. .· J!' ... THE OXIDIZING BEHAV!OROF SOME PLATINUM METAL FLUORIDES . Li onell Graham. · (Ph~ D. Thesis ) IIi !l1/ "~ · r-,> ·1cr7o October 1978 ~t .. ~, ~L l ... ;,() · .. t .. J r.~~ r: !\ ~;~, ·l .• ~~:J"~~ t~J ;,~.)(·_ .. {·~ tJ 1v~ ;;:: r~- J··r·r,;~ Ei:~-:·~,:~~ <'11 ().i\{ Prep~red for the .. U. S. Department of Energy. under Contract W~7405~ENG-48 TWO-WEEK LOAN COPY This is a Library Circulating Copy which may be borrowed for two weeks. .. ' ·t•·! •. ·. For a personal retention copy, call Tech. Info. Diu is ion, Ext. 6782 .. LEGAL NOTICE -___,..-----~__, This report was prepared as an account of work sponsored by the United States Government Neither the United States nor the Depart ment of Energy, nor any of their employees, nor any of their con tractors, subcontractors, or their employees, makes any warraf')ty, express or implied,orassumes any legal liabii bility for the accuracy, completeness or usefulness of nformation, appa- ratus, product. ·· · · disclosed; or rep ·. ts that its use would. not infringe p. · · owned rights ... -i- THE OXIDIZING BEHAVIOR OF SOME PLATINUM METAL FLUORIDES Contents Abstract . v I. General Introduction 1 II. General Apparatus and Handling Techniques 2 A. Apparatus . 2 1. General 2 2. The Cryogenic Technology, Inc., Model 21 Cryo-Cooler .. 3 3. Reactor for Gas-Gas Reaction Products 5 B. -
Environmental Protection Agency § 712.30
Environmental Protection Agency § 712.30 (2) A confidentiality statement § 712.30 Chemical lists and reporting signed and dated by an authorized per- periods. son located at the plant site or cor- (a)(1) Persons subject to this subpart porate headquarters of the respondent B must submit a Preliminary Assess- company. ment Information Manufacturer’s Re- (3) The specific chemical name and port for each chemical substance or Chemical Abstracts Service (CAS) Reg- mixture that is listed or designated in istry Number listed in 40 CFR 712.30. this section. (4) The name, company, address, city, State, ZIP code, and telephone number (2) Unless a respondent has already of a person who is submitting the form, prepared a Manufacturer’s Report in which may be a person located at a conformity with conditions set forth in plant site or corporate headquarters paragraph (a)(3) of this section, the in- that will serve as the respondent, and formation in each Manufacturer’s Re- will be able to answer questions about port must cover the respondent’s latest the information submitted by the com- complete corporate fiscal year as of the pany to EPA. A respondent to this sub- effective date. The effective date will part must include the appropriate Dun be 30 days after the FEDERAL REGISTER and Bradstreet Number for each plant publishes a rule amendment making site reported. the substance or mixture subject to (5) The plant site activities, such as this subpart B. the manufacturing of a chemical sub- (3) Persons subject to this subpart B stance, including the total quantity of need not comply with the requirements the chemical substance (in kilograms) of paragraph (a)(2) of this section if imported in bulk during the reporting they meet either one of the following period. -
WO 2016/074683 Al 19 May 2016 (19.05.2016) W P O P C T
(12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (10) International Publication Number (43) International Publication Date WO 2016/074683 Al 19 May 2016 (19.05.2016) W P O P C T (51) International Patent Classification: (81) Designated States (unless otherwise indicated, for every C12N 15/10 (2006.01) kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, (21) International Application Number: BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, PCT/DK20 15/050343 DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, (22) International Filing Date: HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, 11 November 2015 ( 11. 1 1.2015) KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, (25) Filing Language: English PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, (26) Publication Language: English SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (30) Priority Data: PA 2014 00655 11 November 2014 ( 11. 1 1.2014) DK (84) Designated States (unless otherwise indicated, for every 62/077,933 11 November 2014 ( 11. 11.2014) US kind of regional protection available): ARIPO (BW, GH, 62/202,3 18 7 August 2015 (07.08.2015) US GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, (71) Applicant: LUNDORF PEDERSEN MATERIALS APS TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, [DK/DK]; Nordvej 16 B, Himmelev, DK-4000 Roskilde DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, (DK). -
(12) United States Patent (10) Patent No.: US 9,048,183 B2 Ganguli Et Al
USOO9048183B2 (12) United States Patent (10) Patent No.: US 9,048,183 B2 Ganguli et al. (45) Date of Patent: Jun. 2, 2015 (54) NMOSMETAL GATE MATERIALS, (52) U.S. Cl. MANUFACTURING METHODS, AND CPC .......... HOIL 21/28008 (2013.01); C23C I6/06 EQUIPMENT USING CVD AND ALD (2013.01); C23C 16/32 (2013.01); PROCESSES WITH METAL BASED (Continued) PRECURSORS (58) Field of Classification Search (71) Applicant: Applied Materials, Inc., Santa Clara, None CA (US) See application file for complete search history. (56) References Cited (72) Inventors: Seshadri Ganguli, Sunnyvale, CA (US); Srinivas Gandikota, Santa Clara, CA U.S. PATENT DOCUMENTS (US); Yu Lei, Belmont, CA (US); Xinliang Lu, Fremont, CA (US); Sang 5,055,280 A 10/1991 Nakatani et al. Ho Yu, Cupertino, CA (US); Hoon Kim, 6,139,922 A 10/2000 Kaloyeros et al. Santa Clara, CA (US); Paul F. Ma, Santa (Continued) Clara, CA (US); Mei Chang, Saratoga, CA (US); Maitreyee Mahajani, FOREIGN PATENT DOCUMENTS Saratoga, CA (US); Patricia M. Liu, Saratoga, CA (US) KR 2003OOO9093. A 1, 2003 s OTHER PUBLICATIONS (73) Assignee: APPLIED MATERIALS, INC., Santa International Search Report PCT/US2011/033820 dated Jan. 5, Clara, CA (US) 2012. (*) Notice: Subject to any disclaimer, the term of this (Continued) patent is extended or adjusted under 35 Primary Examiner — Yasser A Abdelaziez U.S.C. 154(b) by 0 days. (74) Attorney, Agent, or Firm — Patterson & Sheridan, LLP (21) Appl. No.: 14/147,291 (57) ABSTRACT Embodiments provide methods for depositing metal-contain (22) Filed: Jan. 3, 2014 ing materials. The methods include deposition processes that form metal, metal carbide, metal silicide, metal nitride, and (65) Prior Publication Data metal carbide derivatives by a vapor deposition process, including thermal decomposition, CVD, pulsed-CVD, or US 2014/O12O712 A1 May 1, 2014 ALD.